Single Inlet Backward Incline Belt Drive Blower Wheel Diameter 12 1/4 Inches Shaft Diameter 1 Inches Inlet Diameter 13 1/4 Inches Inlet Area 0.921 Square Feet Outlet Height 13 1/4 Inches Outlet Width 9 5/8 Inches Outlet Area 0.858 Square Feet Mounting Hole Diameter 1/2 Inch Maximum Inlet Air Temperature 250 Degrees F / 121.1 Degrees C CW Rotation Viewed From Drive Side Weatherproof Drive Cover Included Without Motor Recommended Motor Power Range 1/3 HP Thru 2 HP